MEDYAN.apply_chem_boundary!
Tuple{MEDYAN.Context}
Update chem voxel volumes and diffusion rates.
The chem boundary is the intersection of any boundary set by set_chem_boundary! and membranes with chem_boundary=true.
set_chem_boundary_oversampling_factor! can be used to increase the boundary sampling resolution at the expense of increased memory use.
Calling this will invalidate the chem cache.